161415669 has 4 divisors (see below), whose sum is σ = 215220896. Its totient is φ = 107610444.

The previous prime is 161415649. The next prime is 161415689. The reversal of 161415669 is 966514161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (161415649) and next prime (161415689).

It is not a de Polignac number, because 161415669 - 2⁵ = 161415637 is a prime.

It is a super-2 number, since 2×161415669² = 52110036397435122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161415649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26902609 + ... + 26902614.

It is an arithmetic number, because the mean of its divisors is an integer number (53805224).

Almost surely, 2^161415669 is an apocalyptic number.

It is an amenable number.

161415669 is a deficient number, since it is larger than the sum of its proper divisors (53805227).

161415669 is an equidigital number, since it uses as much as digits as its factorization.

161415669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53805226.

The product of its digits is 38880, while the sum is 39.

The square root of 161415669 is about 12704.9466350709. The cubic root of 161415669 is about 544.4799561902.

The spelling of 161415669 in words is "one hundred sixty-one million, four hundred fifteen thousand, six hundred sixty-nine".